THE POLYPOBACEAE OF WISCONSIN. 129 



the whole plant which is quite persistent even in drying. More often 

 parts of the pileus and stipe are stained quite a bright green. The fig- 

 ure in Fries' Icones agrees very well with our specimens. 



Boletus Elbensis Peck. 



Pileus convex, glabrous, viscid when moist, dingy-gray or pinkish- 

 gray inclining to brownish, obscurely spotted or streaked as if with 

 patches of innate fibrils, flesh white; tubes at first whitish, becoming 

 dingy or brownish-ochraceous, nearly plane, adnate or slightly decur- 

 rent, rather large, angular ; stem nearly equal, annulate, whitish above 

 the annulus, colored like the pileus below, sometimes slightly reticulated 

 at the top ; spores ferruginous-brown, 10 to 12.6 microns long, 4 to 5 

 microns broad. 



Pileus 5 to 10 cm. broad; stem 8 to 12.5 cm. long, 8 to 12.6 mm. thick. 

 Thin woods of tamarack, spruce and balsam. 



I have not seen fresh specimens of this species. The only specimens 

 found were collected near Algoma and identified by Mr. B. 0. Dodge. 

 The largest specimen measures in its dry state about 9 cm. in diameter ; 

 the stipe is about 8 cm. long. The pileus is quite thin, and of a clear 

 coffee-brown, slightly streaked above. The pores are large, angular and 

 adnate. 



The distinctive characteristics seem to be the grayish pileus and the 

 annulate stipe which is wMtish above the annulus. 



Boletus sordidus Frost. 



Pileus convex, subtomentose, dirty dark-brown, flesh white, slightly 

 tinged with green ; tubes long, nearly free, at flrst white, changing to 

 bluish-green; stem smaller at the top, brownish, marked with darker 

 streaks, generally greenish above ; spores 10 to 12.5 microns long, 5 mic- 

 rons broad. 



Pileus about 5 cm. broad. Recent excavations in woods. 



Morgan (18, VII, p. 7) gives the following notes on the Ohio plant: 

 "Damp woods, summer and autumn. Pileus 5 to 7.5 cm. broad, stipe 

 6 to 8 cm. long, 6 mm. thick. Flesh white, tinged with red and green ; 

 tubes change to bluish green. ' ' 



A number of specimens were found near Hazelhurst and Star Lake 

 in excavations made in building logging railroads. The largest was 12 

 cm. in diameter; the stipe 10 cm. long and 1.2 cm. in thickness. The 

 9 



